Georgia 7.GSR.5.2
The Standard
Measure angles in whole number degrees using a protractor.
Georgia's K-12 Mathematics Standards · Solve practical problems involving angle measurement, circles, area of circles, surface area of prisms and cylinders, and volume of cylinders and prisms composed of cubes and right prisms.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students align the protractor’s center mark with an angle’s vertex and place its baseline along one ray. They choose the correct scale and record the measure in whole degrees.
What Mastery Looks Like
- Students can measure angles shown in different positions and record whole-number measures accurately. They use angle type to check whether their answer is reasonable.
Common Misconceptions
- Students may place the protractor’s center away from the vertex or fail to align the baseline with one ray. They may read the wrong number scale or confuse acute and obtuse measures.
How to Assess It
- Exit ticket: Print a 124-degree angle in a tilted position. Ask students to measure it, mark their baseline, and circle the scale they used.
Lesson moves
Ways to Teach It
Students build angles with two straws and a paper fastener, then exchange models and measure each angle with a protractor.
Show an obtuse angle labeled 55 degrees and ask students to explain in writing why the label cannot be correct.
Pairs draw angle cards, measure each angle, and earn a point for a correct measure and a correct angle classification.
Students photograph a door opened at different widths, print the images, and measure the opening angles with protractors.
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Printable 7.GSR.5.2 Worksheet
A ready-to-print activity worksheet aligned to 7.GSR.5.2, with an answer key for the teacher on its own page. No account needed.
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Related Standards
- 7.GSR.5.1
Measure angles in whole nonstandard units.
- 4.GSR.7
Investigate the concepts of angles and angle measurement to estimate and measure angles.
- 4.GSR.7.1
Recognize angles as geometric shapes formed when two rays share a common endpoint. Draw right, acute, and obtuse angles based on the relationship of the angle m...
- 4.GSR.7.2
Measure angles in reference to a circle with the center at the common endpoint of two rays. Determine an angle’s measure in relation to the 360 degrees in a cir...
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